This is such a great video to watch. 

This reminds me of when I was in grade school in Wisconsin and my brother was away at college in New York.  He came to pick me up at school one day.  The teacher told me I had to stay in line until the bell rang before I could leave the classroom... but the minute I saw my brother down the hallway I bolted out of the room, ran to him, hugged him, and cried.